Igneous And Metamorphic

Sunstone (Feldspar)

Plagioclase Feldspar (Na,Ca)(Al,Si)4O8

Ruby

Corundum (Al2O3:Cr)

Quartz (Milky or Cloudy Quartz)

Silicon Dioxide (SiO2)

Rough Sapphire

Corundum (Al2O3)

Green Quartz (Prasiolite/Adventurine)

Silicon Dioxide (SiO2) with inclusions

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Sugilite

KNa2(Fe,Mn,Al)2Li3Si12O30 (Potassium Sodium Lithium Iron Manganese Aluminum Silicate)

Muscovite Mica (on Quartz Matrix)

Muscovite - KAl2(AlSi3O10)(OH)2

Quartz

Crystalline Silicon Dioxide (SiO2)

Agate (Banded Chalcedony)

Agate (Silicon Dioxide, SiO2)

Moonstone

Orthoclase Feldspar ((K,Na)AlSi3O8) with Albite inclusions

Clear Quartz

Silicon Dioxide (SiO2) / Rock Crystal

Clear Quartz

Silicon dioxide (SiO2)

Garnet

Garnet Group (formula varies, e.g., Almasndine: Fe3Al2(SiO4)3)

Clear Quartz

Silicon Dioxide (SiO2) / Rock Crystal

Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Sapphire

Corundum (Al2O3)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Clear Quartz / Rock Crystal

Silicon Dioxide (SiO2)

Quartz (Druzy)

Silicon Dioxide (SiO2)

Quartz (Raw Chunk)

Silicon Dioxide (SiO2)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Gold in Quartz Matrix

Native Gold (Au) with Quartz (SiO2) and Slate/Shale

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Green Calcite

Calcium Carbonate (CaCO3)

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

Smoky Quartz (with possible Garnet inclusions)

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Quartz (Small Fragment)

Silicon Dioxide (SiO2)

Hematite

Iron(III) oxide (Fe2O3)